Package structure and manufacturing method thereof

ABSTRACT

A package structure has a first die, a second die, the third die, a molding compound, a first redistribution layer, an antenna and conductive elements. The first die, the second die and the third die are molded in a molding compound. The first redistribution layer is disposed on the molding compound and is electrically connected to the first die, the second die and the third die. The antenna is located on the molding compound and electrically connected to the first die, the second die and the third die, wherein a distance of an electrical connection path between the first die and the antenna is smaller than or equal to a distance of an electrical connection path between the second die and the antenna and a distance of an electrical connection path between the third die and the antenna. The conductive elements are connected to the first redistribution layer, wherein the first redistribution layer is located between the conductive elements and the molding compound.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefits of U.S. provisional application Ser. No. 62/343,128, filed on May 31, 2016. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.

BACKGROUND

Semiconductor devices and integrated circuits are typically manufactured on a single semiconductor wafer. The dies of the wafer may be processed and packaged with other semiconductor devices or dies at the wafer level, and various technologies have been developed for the wafer level packaging.

BRIEF DESCRIPTION OF THE DRAWINGS

Aspects of the present disclosure are best understood from the following detailed description when read with the accompanying figures. It is noted that, in accordance with the standard practice in the industry, various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion.

FIG. 1A to FIG. 1G are schematic cross sectional views of various stages in a manufacturing method of a package structure according to some exemplary embodiments of the present disclosure.

FIG. 2 is a schematic cross sectional view illustrating a package structure according to some exemplary embodiments of the present disclosure.

FIG. 3A to FIG. 3G are schematic cross sectional views of various stages in a manufacturing method of a package structure according to some exemplary embodiments of the present disclosure.

FIG. 4 is a schematic cross sectional view illustrating a package structure according to some exemplary embodiments of the present disclosure.

FIG. 5A to FIG. 5E are schematic cross sectional views of various stages in a manufacturing method of a package structure according to some exemplary embodiments of the present disclosure.

FIG. 6 is a schematic cross sectional view illustrating a package structure according to some exemplary embodiments of the present disclosure.

FIG. 7A to FIG. 7E are schematic cross sectional views of various stages in a manufacturing method of a package structure according to some exemplary embodiments of the present disclosure.

FIG. 8 is a schematic cross sectional view illustrating a package structure according to some exemplary embodiments of the present disclosure.

FIG. 9A to FIG. 9I are schematic cross sectional views of various stages in a manufacturing method of a package structure according to some exemplary embodiments of the present disclosure.

DETAILED DESCRIPTION

The following disclosure provides many different embodiments, or examples, for implementing different features of the provided subject matter. Specific examples of components and arrangements are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting. For example, the formation of a first feature over or on a second feature in the description that follows may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features may be formed between the first and second features, such that the first and second features may not be in direct contact. In addition, the present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

Further, spatially relative terms, such as “beneath,” “below,” “lower,” “above,” “upper” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The apparatus may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein may likewise be interpreted accordingly.

In addition, terms, such as “first,” “second,” “third,” “fourth,” and the like, may be used herein for ease of description to describe similar or different element(s) or feature(s) as illustrated in the figures, and may be used interchangeably depending on the order of the presence or the contexts of the description.

FIG. 1A to FIG. 1H are schematic cross sectional views of various stages in a manufacturing method of a package structure according to some exemplary embodiments of the present disclosure. In exemplary embodiments, the manufacturing method is part of a wafer level packaging process. In some embodiments, two dies are shown to represent plural dies of the wafer, and a package 10 is shown to represent a package structure obtained following the manufacturing method.

Referring to FIG. 1A, in some embodiments, a wafer 100 including first dies 110 and a wafer 200 including second dies 120 are provided, and a dicing process is performed to cut the wafer 100 and the wafer 200 along a cutting line (shown as the dotted line in FIG. 1A) into individual and separated first dies 110 and second dies 120.

In one embodiment, the dicing process is a wafer dicing process. In certain embodiments, before performing the dicing process, first through interlayer vias (TIVs) 151 are formed on the contacts 111, 121 of each first die 110 and each second die 120, and are electrically connected to the first die 110 and the second die 120. In some embodiments, the first TIVs 151 are through integrated fan-out (InFO) vias. In one embodiment, the first TIVs 151 may be formed by forming a mask pattern (not shown) covering the first dies 110 and the second die 120 with openings exposing the contacts 111, 121, forming a metallic material filling the openings to form the first TIVs 151 by electroplating or deposition and then removing the mask pattern. In some embodiments, before the dicing process, a die attach film 161 is provided to bottom surfaces of the first wafer 100 and the second wafer 200.

Referring to FIG. 1B, in some embodiments, a carrier 102 is provided, the carrier 102 may be a glass carrier or any suitable carrier for the manufacturing method of the package structure. In some embodiments, the carrier 102 is provided with a debond layer 103 coated thereon, and the material of the debond layer 103 may be any material suitable for debonding the carrier 102 from the above layers disposed thereon. In certain embodiments, the carrier 102 has a central region CR and a periphery region PR surrounding the central region CR, and a dielectric layer 104 is formed to cover the central region CR of the carrier 102 and a first metallic portion 210 is formed in the periphery region PR of the carrier 102. In exemplary embodiments, the dielectric layer 104 and the first metallic portion 210 are formed by forming a dielectric material layer (not shown) over the carrier 102, patterning the dielectric material layer, forming a metallization layer (not shown) by electroplating or deposition over the patterned dielectric material layer to form the dielectric layer 104 covering the central region CR and the first metallic portion 210 (part of an antenna) in the periphery region PR.

Referring to FIG. 1C, one or more third dies 130 are provided. In some embodiments, the first die 110, the second die 120, and the third die 130 are disposed on the dielectric layer 104 and over the carrier 102. In one embodiment, the first die 110 is arranged aside of the second die 120, while the third die 130 is stacked on the first and second dies 110, 120. In certain embodiments, the first die 110, the second die 120 and the third die 130 are disposed in the central region CR and are not overlaid with the first metallic portion 210 located in the periphery region. In some embodiments, due to the die attach film 161 provided between the first die 110, the second die 120 and the dielectric layer 104, the first die 110 and the second die 120 are stably adhered to the dielectric layer 104. In some embodiments, a second die attach film 162 is provided between a back surface of the third die 130 and top surfaces of the first die 110 and the second die 120 for better adhering the third die 130 to the first die 110 and the second die 120. In certain embodiments, as shown in FIG. 1C, the first die 110, the second die 120 and the third die 130 are front-to-back attached. In some embodiments, the third die 130 is provided with a protection layer 163 covering a top surface of the third die 130 with openings exposing contacts 131 of the third die 130 and contacting posts 153 filled in the openings and located on the contacts 131 of the third die 130. In some embodiments, the material of the contacting posts 153 includes copper and/or copper alloys. In some embodiments, the material of the protection layer 163 may include silicon oxide, silicon nitride, silicon oxynitride, or any suitable dielectric material.

In some embodiments, the first die 110, the second die 120 and the third die 130 are different types of dies or the same types of dies and may be individually selected from application-specific integrated circuit (ASIC) chips, analog chips (for example, wireless and radio frequency chips, e.g., 2.4 GHz radio frequency chip, 5 GHz radio frequency chip, a combined 2.4 GHz/5 GHz radio frequency chip, a millimeter wave radio frequency chip of 28 GHz, 39 GHz or 60 GHz, and the like radio frequency chip), digital chips (for example, a baseband chip of 28 GHz, 39 GHz or 60 GHz, and the like baseband chip), integrated passive devices (IPDs), voltage regulator chips, sensor chips, memory chips, or the like. Throughout this patent disclosure, a 60 GHz radio frequency chip and a 60 GHz baseband chip are used as a millimeter wave example for embodiment discussions. However, the disclosure is not limited thereto. In certain embodiments, as shown in FIG. 1C, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip, and the third die 130 is a 60 GHz baseband chip. Due to the dies of different types in the package structure 10 are stacked at different levels, the package structure 10 has small form factor and further has a much wider frequency range application. In an alternative embodiment, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 60 GHz baseband chip, and the third die 130 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip. In an alternative embodiment, the first die 110 is a 60 GHz baseband chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip, and the third die 130 is a 60 GHz radio frequency chip. However, the disclosure is not limited thereto.

Referring to FIG. 1D, in some embodiments, the first die 110, the second die 120, the third die 130 and the first TIVs 151 are molded and encapsulated in a molding compound 160. In one embodiment, the molding compound 160 at least fills the space between the first die 110, the second die 120, the third die 130 and the first TIVs 151, and covers the patterned dielectric layer 104 and the first metallic portion 210. In some embodiments, the molding compound 160 is planarized to expose top surfaces of the first TIVs 151, the contacting posts 153 and the protection layer 163. In certain embodiments, as shown in FIG. 1D, after the planarization, top surfaces of the first TIVs 151 and the molding compound 160 become substantially leveled. In one embodiment, the top surfaces of the first TIVs 151, the contacting posts 153, the molding compound 160 and the protection layer 163 are coplanar. In one embodiment, the material of the molding compound 160 includes epoxy resins, phenolic resins or silicon-containing resins. In some embodiments, the molding compound 160 and the first TIVs 151 are planarized through a grinding process or a chemical mechanical polishing (CMP) process.

Referring to FIG. 1E, in some embodiments, a first redistribution layer 170 is formed on the molding compound 160, the first TIVs 151 and the third die 130. In some embodiments, the first redistribution layer 170 is electrically connected to the first die 110 and the second die 120 via the first TIVs 151 and is electrically connected to the third die 130 via the contacting posts 153. The formation of the first redistribution layer 170 includes sequentially forming one or more polymer dielectric layers 172 and one or more metallization layers 174 in alternation. In certain embodiments, as shown in FIG. 1E, the metallization layers 174 are sandwiched between the polymer dielectric layers 172, but the top surface of the topmost layer of the metallization layers 174 is exposed and the lowest layer of the metallization layers 174 is connected to the first TIVs 151 and the contacting posts 153 of the third die 110. In some embodiments, the material of the metallization layers 174 includes aluminum, titanium, copper, nickel, tungsten, and/or alloys thereof, and the metallization layers 174 may be formed by electroplating or deposition. In some embodiments, the material of the polymer dielectric layers 172 includes polyimide, epoxy resin, acrylic resin, phenol resin, benzocyclobutene (BCB), polybenzooxazole (PBO), or any other suitable polymer-based dielectric material.

In certain embodiments, as shown in FIG. 1E, a portion of the metallization layers 174 of the first redistribution layer 170 located in the periphery region PR forms a second metallic portion 220. The first metallic portion 210 and the second metallic portion 220 located at different sides of the molding compound 160 constitute an antenna 200 and work together for antenna applications. In some embodiments, the antenna 200 is electrically connected to the first die 110, the second die 120 and the third die 130. Through the first redistribution layer 170, the contacting posts 153 and/or the first TIVs 151, electrical connection paths from the antenna 200 to the first die 110, the second die 120 and the third die 130 are established. In some embodiments, a distance of the electrical connection path between the first die 110 and the antenna 200 is smaller than or equal to a distance of the electrical connection path between the second die 120 and the antenna 200 and is smaller than or equal to a distance of the electrical connection path between the third die 130 and the antenna 200. With such specific distance condition, the package structure 10 has better electrical performance.

Referring to FIG. 1F, in some embodiments, conductive elements 180 are disposed on the topmost metallization layer 174 of the first redistribution layer 170. In some embodiments, prior to disposing the conductive elements 180, solder paste (not shown) or flux is applied so that the conductive elements 180 are better fixed to the topmost metallization layer 174. In some embodiments, the conductive elements 180 are, for example, solder balls or ball grid array (BGA) balls placed on the exposed topmost metallization layer 174 of the first redistribution layer 170 and parts of the topmost metallization layer 174 underlying the conductive elements 180 function as UBM layers. In some embodiments, some of the conductive elements 180 are electrically connected to the first die 110 and some of the conductive elements 180 are electrically connected to the second die 120 through the first redistribution layer 170 and the first TIVs 151, and some of the conductive elements 180 are electrically connected to the third die 130 through the first redistribution layer 170 and the contacting posts 153.

Referring to FIG. 1F, in some embodiments, a fourth die 140 is disposed on the top surface of the first redistribution layer 170 with connectors 190 there-between. In one embodiment, the fourth die 140 is joined to the first redistribution layer 170 after the conductive elements 180 are disposed. In some embodiments, the fourth die 140 is connected to the metallization layer 174 of the first redistribution layer 170 through flip chip bonding technology. In some embodiments, the connectors 190 are, for example, bumps and parts of the topmost metallization layer 174 underlying the connectors 190 function as bump pads. In some embodiments, the fourth die 140 includes integrated passive components (IPDs) such as capacitors, resistors, inductors, and transducers, or the fourth die 140 is a voltage regulator chip, a sensor chip, a memory chip or the like. In some embodiments, some of the conductive elements 180 and the fourth die 140 are electrically connected through the first redistribution layer 170. In some embodiments, the fourth die 140 may be electrically connected to the first die 110 and the second die 120 through the connectors 190, the first redistribution layer 170 and the first TIVs 151, and may be electrically connected to the third die 110 through the connectors 190, the first redistribution layer 170 and the contacting post 153. In one embodiment, the fourth die 140 and some of the conductive elements 180 are electrically connected to the antenna 200.

Referring to FIG. 1G, in some embodiments, the carrier 102 is debonded from the dielectric layer 104 to form the package structure 10. In some embodiments, the dielectric layer 104 is easily separated from the carrier 102 due to the debond layer 103, and the first metallic portion 210 of the antenna 200 may be exposed.

FIG. 2 is a schematic cross sectional view illustrating a package structure according to some exemplary embodiments. The package structure 10 of FIG. 2 may be fabricated following the previously described manufacturing process as described in FIG. 1A-1G. Referring to FIG. 2, in some embodiments, the package structure 10 includes the first die 110, the second die 120, the third die 130, the molding compound 160, the first redistribution layer 170, the antenna 200, the fourth die 140 and the conductive elements 180. In some embodiments, the first die 110 and the second die 120 are disposed on the dielectric layer 104, the third die 130 is stacked over the first die 110 and the second die 120. In some embodiments, the first TIVs 151 are in direct contact with the contacts 111, 121 of the first die 110 and the second die 120, and the contacting posts 153 located in the protection layer 163 are in direct contact with the contacts 131. In one embodiment, the first die 110, the second die 120, the third die 130, and the first TIVs 151 are encapsulated by the molding compound 160, the first TIVs 151 and the contacting posts 153 are in contact with the first redistribution layer 170. In some embodiments, the first redistribution layer 170 is electrically connected to the first die 110, the second die 120 and the third die 130.

In some embodiments, the molding compound 160 is located between the dielectric layer 104 and the first redistribution layer 170. In some embodiments, the fourth die 140 and the conductive elements 180 are disposed on the first redistribution layer 170, and the first redistribution layer 170 is located between the fourth die 140 and the molding compound 160 and between the conductive elements 180 and the molding compound 160. In some embodiments, the conductive elements 180 are electrically connected the first redistribution layer 170 and electrically connected to the first die 110, the second die 120 and/or the third die 130 through the first redistribution layer 170, the first TIVs 151 and the contacting posts 153. In one embodiment, the fourth die 140 is electrically connected to the first redistribution layer 170 through the connectors 190.

In certain embodiments, as shown in FIG. 2, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip, and the third die 130 is a 60 GHz baseband chip. In one alternative embodiment, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 60 GHz baseband chip, and the third die 130 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip. In another alternative embodiment, the first die 110 is a 60 GHz baseband chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, and the third die 130 is a 60 GHz radio frequency chip.

In one embodiment, the first metallic portion 210 of the antenna 200 located in the periphery region PR of the carrier 102, and the second metallic portion 220 located in the periphery region PR of the first redistribution layer 170 are located at different sides of the molding compound 160. In some embodiments, a distance of the electrical connection path between the first die 110 and the antenna 200 is smaller than or equal to a distance of the electrical connection path between the second die 120 and the antenna 200 and is smaller than or equal to a distance of the electrical connection path between the third die 130 and the antenna 200, which allows better electrical performance of the package structure 10.

FIG. 3A to FIG. 3G are schematic cross sectional views of various stages in a manufacturing method of a package structure according to some exemplary embodiments of the present disclosure. The elements similar to or substantially the same as the elements described previously will use the same reference numbers, and certain details or descriptions of the same elements may not be repeated herein.

Referring in FIG. 3A, in some embodiments, the antenna 200 is formed on the debond layer 103 disposed on the central region CR of the carrier 102. In alternative embodiments, the antenna 200 is sequentially formed on the carrier 102, and the materials of the antenna 200 and the formation methods similar to the processes for forming the first metallic portion 210 and the second metallic portion 220 as described in FIGS. 1B and 1E may not be repeated herein. In certain embodiments, the methods of forming the antenna 200 include forming the dielectric layer 104 in the central region CR of the carrier 102 and forming the first metallic portion 210 of the antenna 200 in the central region CR of the carrier 102 not covered by the dielectric layer 104. A dielectric material layer 105 is formed over and covers the dielectric layer 104 and the first metallic portion 210 of the antenna 200. A dielectric layer 106 is formed on the dielectric material layer 105 and the second metallic portion 220 is formed on the dielectric material layer 105 exposed by the dielectric layer 106. In some embodiments, the location of the first metallic portion 210 corresponds to that of the second metallic portion 220, and the first metallic portion 210 and the second metallic portion 220 of the antenna 200 work together for antenna applications.

Referring to FIG. 3B, in some embodiments, one or more second through interlayer vias (TIVs) 152 are formed on the second metallic portion 220 of the antenna 200, and the second TIV 152 is directly connected to the second metallic portion 220 of the antenna 200. In some embodiments, the second TIV 152 is a through integrated fan-out (InFO) via.

Referring to FIG. 3C, in some embodiments, one or more third dies 130 are provided. In some embodiments, the first die 110, the second die 120 and the third die 130 are disposed on the antenna 200 and over the carrier 102. In certain embodiments, the first die 110, the second die 120 and the third die 130 are disposed in the central region CR of the carrier 102 and are located above the antenna 200 and aside the second TIV 152. In some embodiments, the die attach films 161, 162 are provided between the first die 110, the second die 120 and the antenna 200 and between the third die 130 and the first and second dies 110, 120. In certain embodiments, as shown in FIG. 3C, the first die 110, the second die 120 and the third die 130 are front-to-back attached. In some embodiments, before the third die 130 is attached to the first die 110 and the second die 120, the first TIVs 151 are formed on and connected to the contacts 111, 121 of the first and second dies 110, 120.

In certain embodiments, as shown in FIG. 3C, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip or a combined 2.4 GHz/5 GHz radio frequency chip, and the third die 130 is a 60 GHz baseband chip. Due to the antenna and the dies of different types in the package structure 10 are stacked at different levels, the package structure 10 has small form factor and further has a much wider frequency range. In alternative embodiment, the first die 110 is a 60 GHz baseband chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip, and the third die 130 is a 60 GHz radio frequency chip. However, the disclosure is not limited thereto.

Referring to FIG. 3D, in some embodiments, the first die 110, the second die 120, the third die 130, the first TIVs 151, the second TIV 152 and the contacting posts 153 are encapsulated in a molding compound 160. In one embodiment, the molding compound 160 at least fills the space between the first die 110, the second die 120, the third die 130, the first TIVs 151 and the second TIV 152, and covers the antenna 200. In some embodiments, the molding compound 160 is planarized to expose top surfaces of the first TIVs 151, the second TIV 152, the contacting posts 153 and the protection layer 163. In certain embodiments, as shown in FIG. 3D, after the planarization, the first TIVs 151, the second TIV 152 and the molding compound 160 become substantially leveled. In one embodiment, the top surfaces of the first TIVs 151, the second TIV 152, the contacting posts 153, the molding compound 160 and the protection layer 163 are coplanar.

Referring to FIG. 3E, in some embodiments, the first redistribution layer 170 is formed on the molding compound 160, the first TIVs 151, the second TIV 152 and the third die 130. In some embodiments, the first redistribution layer 170 is electrically connected to the first die 110 and the second die 120 via the first TIVs 151, the third die 130 via the contacting posts 153, and is electrically connected to the antenna 200 via the second TIV 152. The formation of the first redistribution layer 170 has been described in FIG. 1E and may not be repeated herein. In certain embodiments, the top surface of the topmost layer of the metallization layers 174 is exposed and the lowest layer of the metallization layers 174 is connected to the first TIVs 151, the second TIV 152 and the contacting posts 153.

In some embodiments, the antenna 200 is electrically connected to the first die 110, the second die 120 and the third die 130. Through the second TIV 152, the first redistribution layer 170, the first TIVs 151 and/or the contacting posts 153, electrical connection paths from the antenna 200 to the first die 110, the second die 120 and the third die 130 are established. In some embodiments, a distance of the electrical connection path between the first die 110 and the antenna 200 is smaller than or equal to a distance of the electrical connection path between the second die 120 and the antenna 200 and is smaller than or equal to a distance of the electrical connection path between the third die 130 and the antenna 200. With such specific distance condition, the package structure 10 has better electrical performance.

Referring to FIG. 3F, in some embodiments, the conductive elements 180 are disposed on the topmost metallization layer 174 of the first redistribution layer 170. In some embodiments, some of the conductive elements 180 are electrically connected to the first die 110 and the second die 120 through the first redistribution layer 170 and the first TIVs 151, some of the conductive elements 180 are electrically connected to the third die 130 through the first redistribution layer 170 and the contacting posts 153, and some of the conductive elements 180 are electrically connected to the antenna 200 through the second TIV 152 and the first redistribution layer 170. In some embodiments, the fourth die 140 is disposed on the top surface of the first redistribution layer 170 with connectors 190 there-between. In one embodiment, the fourth die 140 is joined to the first redistribution layer 170 after the conductive elements 180 are disposed. In some embodiments, the fourth die 140 is connected to the metallization layer 174 of the first redistribution layer 170 through flip chip bonding technology. In some embodiments, some of the conductive elements 180 and the fourth die 140 are electrically connected through the first redistribution layer 170. In some embodiments, the fourth die 140 may be electrically connected to the first die 110 and the second die 120 through the connectors 190, the first redistribution layer 170 and the first TIVs 151, the fourth die 140 may be electrically connected to the third die 130 through the connectors 190, the first redistribution layer 170 and the contacting post 153, and the fourth die 140 may be electrically connected to the antenna 200 through the connectors 190, the first redistribution layer 170 and the second TIV 152.

Referring to FIG. 3G, in some embodiments, the carrier 102 is debonded from the antenna 200 to form the package structure 10. The antenna 200 is easily separated from the carrier 102 due to the debond layer 103 of the carrier 102. In some embodiments, the dielectric layer 104 is debonded from the carrier 102, and the first metallic portion 210 of the antenna 200 may be exposed.

FIG. 4 is a schematic cross sectional view illustrating a package structure according to some exemplary embodiments. The package structure 10 of FIG. 4 may be fabricated following the previously described manufacturing process as described in FIG. 1A and FIG. 3A-3G. Referring to FIG. 4, in some embodiments, the package structure 10 includes the antenna 200, the first die 110, the second die 120, the third die 130, the molding compound 160, the first redistribution layer 170, the fourth die 140 and the conductive elements 180. In some embodiments, the first die 110 and the second die 120 are disposed on the antenna 200, the third die 130 is stacked over the first die 110 and the second die 120. In some embodiments, the first TIVs 151 are in direct contact with the contacts 111, 121 of the first die 110 and the second die 120, the second TIV 152 is in direct contact with the second metallic portion 220 of the antenna 200, and the contacting posts 153 located in the protection layer 163 are in direct contact with the contacts 131. In one embodiment, the first die 110, the second die 120, the third die 130, the first TIVs 151, the second TIV 152 and the contacting posts 153 are encapsulated by the molding compound 160, where the top surfaces of the first TIVs 151, the second TIV 152 and the contacting posts 153 are in contact with the first redistribution layer 170. In some embodiments, the first redistribution layer 170 is electrically connected to the first die 110, the second die 120 and the third die 130.

In some embodiments, the molding compound 160 is located between the antenna 200 and the first redistribution layer 170. In some embodiments, the fourth die 140 and the conductive elements 180 are disposed on the first redistribution layer 170, and the first redistribution layer 170 is located between the fourth die 140 and the molding compound 160 and between the conductive elements 180 and the molding compound 160. In some embodiments, the conductive elements 180 are electrically connected the first redistribution layer 170 and is electrically connected to the first die 110, the second die 120, the third die 130 and/or the antenna 200 through the first redistribution layer 170, the first TIVs 151, the second TIV 152 and the contacting posts 153. In one embodiment, the fourth die 140 is electrically connected to the first redistribution layer 170 through the connectors 190.

In certain embodiments, as shown in FIG. 4, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip, and the third die 130 is a 60 GHz baseband chip. Accordingly, due to the dies of different types in the package structure 10 are stacked at different levels, the package structure 10 has small form factor and further has a much wider frequency range. In one alternative embodiment, the first die 110 is a 60 GHz baseband chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip, and the third die 130 is a 60 GHz radio frequency chip. However, the disclosure is not limited thereto.

In one embodiment, the antenna 200 is below the molding compound 160. In some embodiments, a distance of the electrical connection path between the first die 110 and the antenna 200 is smaller than or equal to a distance of the electrical connection path between the second die 120 and the antenna 200 and is smaller than or equal to a distance of the electrical connection path between the third die 130 and the antenna 200. With such specific distance condition, the package structure 10 has better electrical performance.

FIG. 5A to FIG. 5E are schematic cross sectional views of various stages in a manufacturing method of a package structure according to some exemplary embodiments of the present disclosure. The elements similar to or substantially the same as the elements described previously will use the same reference numbers, and certain details or descriptions of the same elements may not be repeated herein.

Referring in FIG. 5A, in some embodiments, the second redistribution layer 270 is sequentially formed on the antenna 200 and over the carrier 102, following the process as described in FIG. 3A. In some embodiments, the second redistribution layer 270 is electrically connected to the antenna 200. The formation of the second redistribution layer 270 includes sequentially forming one or more polymer dielectric layers 272 and one or more metallization layers 274 in alternation. The materials of the second redistribution layer 270 and the formation methods similar to the processes for forming the first redistribution layer 170 as described in FIG. 1E may not be repeated herein. In certain embodiments, the top surface of the topmost layer of the metallization layer 274 is exposed and the lowest layer of the metallization layer 274 is directly connected to the second metallic portion 220 of the antenna 200. In some embodiments, the second through interlayer vias (TIVs) 152 are disposed on the topmost layer of the metallization layer 274 of the second redistribution layer 270, and the second TIVs 152 are directly connected to the antenna 200 through the second redistribution layer 270. In some embodiments, the second TIVs 152 are a through integrated fan-out (InFO) via.

Referring in FIG. 5B, in some embodiments, one or more third dies 130 are provided. In some embodiments, the first die 110, the second die 120 and the third die 130 are disposed on the second redistribution layer 270 and over the carrier 102. In certain embodiments, the first die 110, the second die 120 and the third die 130 are located above the antenna 200 and aside the second TIVs 152. In some embodiments, the top surface of the first die 110 is attached to the second redistribution layer 270, wherein the first die 110 is attached to the second redistribution layer 270 with the contacting posts 153 through flip chip bonding technology (an underfill layer not shown). In some embodiments, the die attach film 161 is provided between the second die 120, the third die 130 and the second redistribution layer 270. In certain embodiments, as shown in FIG. 5B, the first die 110, the second die 120 and the third die 130 are arranged side-by-side. In some embodiments, the second die 120 and third die 130 are provided with the protection layer 163 covering top surfaces of the second die 120 and the third die 130 with openings exposing contacts 121, 131 and contacting posts 153 filled in the openings and located on the contacts 121, 131.

In certain embodiments, as shown in FIG. 5B, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip, and the third die 130 is a 60 GHz baseband chip. Due to the antenna and the dies of different types in the package structure 10 are stacked at different levels, the package structure 10 has small form factor and further has a much wider frequency range. In alternative embodiment, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 60 GHz baseband chip, and the third die 130 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip. However, the disclosure is not limited thereto.

Referring to FIG. 5B, in some embodiments, the first die 110, the second die 120, the third die 130, the second TIVs 152 and the contacting posts 153 are molded and encapsulated in a molding compound 160. In one embodiment, the molding compound 160 at least fills the space between the first die 110, the second die 120, the third die 130 and the second TIVs 152, and covers the second redistribution layer 270 and the antenna 200. In some embodiments, the molding compound 160 is planarized to expose top surfaces of the second TIVs 152, the contacting posts 153, and the protection layer 163. In certain embodiments, as shown in FIG. 5B, after the planarization, top surfaces of the second TIVs 152 and the molding compound 160 become substantially leveled. In one embodiment, the top surfaces of the second TIVs 152, the contacting posts 153, the molding compound 160 and the protection layer 163 are coplanar.

Referring to FIG. 5C, in some embodiments, the first redistribution layer 170 is formed on the molding compound 160, the second TIVs 152, the first die 110, the second 120 and the third die 130. In some embodiments, the first redistribution layer 170 is electrically connected to the first die 110 and the antenna 200 via the second redistribution layer 270, the second TIVs 152 and/or the contacting posts 153, and the first redistribution layer 170 is electrically connected to the second die 120 and the third die 130 via the contacting posts 153. The formation of the first redistribution layer 170 has been described in FIG. 1E and may not be repeated herein. In certain embodiments, the top surface of the topmost layer of the metallization layers 174 is exposed and the lowest layer of the metallization layers 174 is connected to the second TIVs 152 and the contacting posts 153 of the second die 120 and the third die 130.

In some embodiments, the antenna 200 is electrically connected to the first die 110, the second die 120 and the third die 130. In certain embodiments, the antenna 200 is electrically connected to the first die 110 through the second redistribution layer 270 and the contacting posts 153 and electrically connected to the second die 120 and the third die 130 through the second redistribution layer 270, the second TIVs 152, the first redistribution layer 170 and the contacting posts 153, electrical connection paths from the antenna 200 to the first die 110, the second die 120 and the third die 130 are established. In some embodiments, a distance of the electrical connection path between the first die 110 and the antenna 200 is smaller than or equal to a distance of the electrical connection path between the second die 120 and the antenna 200 and is smaller than or equal to a distance of the electrical connection path between the third die 130 and the antenna 200. With such specific distance condition, the package structure 10 has better electrical performance.

Referring to FIG. 5D, in some embodiments, the conductive elements 180 are disposed on the topmost layer of the metallization layers 174 of the first redistribution layer 170. In some embodiments, some of the conductive elements 180 are electrically connected to the first die 110 and the antenna 200 through the first redistribution layer 170, the second TIVs 152, the second redistribution layer 270 and/or the contacting posts 153. In some embodiments, some of the conductive elements 180 are electrically connected to the second die 120 and the third die 130 through the first redistribution layer 170 and the contacting posts 153.

In one embodiment, the fourth die 140 is joined to the first redistribution layer 170 after the conductive elements 180 are disposed. In some embodiments, the fourth die 140 is connected to the topmost layer of the metallization layers 174 of the first redistribution layer 170 with connectors 190 there-between through flip chip bonding technology. In some embodiments, the fourth die 140 may be electrically connected to the first die 110 and the antenna 200 through the connectors 190, the first redistribution layer 170, the second TIVs 152, the second redistribution layer 270 and/or the contacting posts 153 and may be electrically connected to the second die 120 and the third die 130 through the connectors 190, the first redistribution layer 170 and the contacting post 153. In some embodiments, some of the conductive elements 180 and the fourth die 140 are electrically connected through the first redistribution layer 170.

Referring to FIG. 5E, in some embodiments, the carrier 102 is debonded from the antenna 200 to form the package structure 10. The antenna 200 is easily separated from the carrier 102 due to the debond layer 103 of the carrier 102. In some embodiments, the dielectric layer 104 is debonded from the carrier 102, and the first metallic portion 210 of the antenna 200 may be exposed.

FIG. 6 is a schematic cross sectional view illustrating a package structure according to some exemplary embodiments. The package structure 10 of FIG. 6 may be fabricated following the previously described manufacturing process as described in FIG. 3A and FIG. 5A-5E. Referring to FIG. 6, in some embodiments, the package structure 10 includes the antenna 200, the second redistribution layer 270, the first die 110, the second die 120, the third die 130, the molding compound 160, the first redistribution layer 170, the fourth die 140 and the conductive elements 180. In some embodiments, the second redistribution layer 270 is disposed on the antenna 200, and the first die 110, the second die 120 and the third die 130 are disposed on the second redistribution layer 270. In certain embodiments, the first die 110, the second die 120 and the third die 130 are arranged side-by-side, which reduces the thickness of the package structure 10. In some embodiments, the second TIVs 152 are in direct contact with the first redistribution layer 170 and the second redistribution layer 270 and are located there-between. The contacting posts 153 on the first die are in direct contact with the contacts 111 of the first die 110 for flip chip bonding to the second redistribution layer 270. The contacting posts 153 located in the protection layers 163 disposed on the second die 120 and the third die 130 are in direct contact with the contacts 121, 131. In some embodiments, the first die 110, the second die 120, the third die 130, the second TIVs 152 and the contacting posts 153 are encapsulated by the molding compound 160, where the top surfaces of the second TIVs 152 and the contacting posts 153 are in contact with the first redistribution layer 170. In some embodiments, the first redistribution layer 170 is electrically connected to the first die 110, the second die 120 and the third die 130.

In some embodiments, the molding compound 160 is located between the antenna 200 and the first redistribution layer 170 and between the second redistribution layer 270 and the first redistribution layer 170. In some embodiments, the fourth die 140 and the conductive elements 180 are disposed on the first redistribution layer 170, and the first redistribution layer 170 is located between the fourth die 140 and the molding compound 160 and between the conductive elements 180 and the molding compound 160. In some embodiments, the conductive elements 180 are electrically connected the first redistribution layer 170 and electrically connected to the first die 110, the second die 120, the third die 130 and/or the antenna 200 through the first redistribution layer 170, the second TIVs 152, the second redistribution layer 270 and the contacting posts 153. In one embodiment, the fourth die 140 is electrically connected to the first redistribution layer 170 through the connectors 190.

In certain embodiments, as shown in FIG. 6, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip, and the third die 130 is a 60 GHz baseband chip. Accordingly, due to the dies of different types in the package structure 10 are stacked at different levels, the package structure 10 has small form factor and further has a much wider frequency range. In one alternative embodiment, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 60 GHz baseband chip, and the third die 130 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip. However, the disclosure is not limited thereto.

In one embodiment, the antenna 200 is right above the molding compound 160. In some embodiments, a distance of the electrical connection path between the first die 110 and the antenna 200 is smaller than or equal to a distance of the electrical connection path between the second die 120 and the antenna 200 and is smaller than or equal to a distance of the electrical connection path between the third die 130 and the antenna 200. With such specific distance condition, the package structure 10 has better electrical performance.

FIG. 7A to FIG. 7D are schematic cross sectional views of various stages in a manufacturing method of a package structure according to some exemplary embodiments of the present disclosure. The elements similar to or substantially the same as the elements described previously will use the same reference numbers, and certain details or descriptions of the same elements may not be repeated herein.

Referring in FIG. 7A, in some embodiments, one or more third dies 130 are provided. In some embodiments, the first die 110, the second die 120 and the third die 130 are disposed on the second redistribution layer 270 and over the carrier 102 through flip clip bonding, following the process as described in FIG. 5A. In certain embodiments, the first die 110, the second die 120 and the third die 130 are located above the antenna 200 and aside the second TIVs 152. In some embodiments, the top surface of the first die 110, the second die 120 and the third die 130 are attached to the second redistribution layer 270 with the contacting posts 153 through flip chip bonding technology. In certain embodiments, as shown in FIG. 7A, the first die 110, the second die 120 and the third die 130 are arranged side-by-side. In some embodiments, the contacting posts 153 are in direct contact with the contacts 111, 121, 131 of the first die 110, the second die 120 and the third die 130, respectively, for flip chip bonding to the second redistribution layer 270. In certain embodiments, the first die 110, the second die 120 and the third die 130 are electrically connected to the second redistribution layer 270 through the contacting posts 153.

In certain embodiments, as shown in FIG. 7A, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip, and the third die 130 is a 60 GHz baseband chip. Due to the antenna and the dies of different types in the package structure 10 are stacked at different levels, the package structure 10 has small form factor and further has a much wider frequency range. In alternative embodiment, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 60 GHz baseband chip, and the third die 130 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip. However, the disclosure is not limited thereto.

Referring to FIG. 7B, in some embodiments, the first die 110, the second die 120, the third die 130, the second TIVs 152 and the contacting posts 153 are molded and encapsulated in a molding compound 160. In one embodiment, the molding compound 160 at least fills the space between the first die 110, the second die 120, the third die 130 and the second TIVs 152, and covers the second redistribution layer 270 and the antenna 200. In some embodiments, the molding compound 160 is planarized to expose top surfaces of the second TIVs 152. In certain embodiments, as shown in FIG. 7B, after the planarization, top surfaces of the second TIVs 152 and the molding compound 160 become substantially leveled. In one embodiment, the top surfaces of the second TIVs 152, the back surfaces of the first die 110, the second die 120 and the third die 130 and the molding compound 160 are coplanar.

Referring to FIG. 7C, in some embodiments, the first redistribution layer 170 is formed on the molding compound 160, the second TIVs 152, and the back surfaces of the first die 110, the second 120 and the third die 130. In some embodiments, the first redistribution layer 170 is electrically connected to the first die 110, the second die 120 and the third die 130 via the second TIVs 152, the second redistribution layer 270 and the contacting posts 153. In some embodiments, the first redistribution layer 170 is electrically connected to the antenna 200 via the second TIVs 152 and the second redistribution layer 270. The formation of the first redistribution layer 170 has been described in FIG. 1E and may not be repeated herein. In certain embodiments, as shown in FIG. 7C, the metallization layers 174 are sandwiched between the polymer dielectric layers 172, but the top surface of the topmost layer of the metallization layers 174 is exposed and the lowest layer of the metallization layers 174 is connected to the second TIVs 152 and the back surfaces of the first die 110, the second die 120 and the third die 130.

In some embodiments, the antenna 200 is electrically connected to the first die 110, the second die 120 and the third die 130 through the second TIVs 152, the second redistribution layer 270 and the contacting posts 153, electrical connection paths from the antenna 200 to the first die 110, the second die 120 and the third die 130 are established. In some embodiments, a distance of the electrical connection path between the first die 110 and the antenna 200 is smaller than or equal to a distance of the electrical connection path between the second die 120 and the antenna 200 and is smaller than or equal to a distance of the electrical connection path between the third die 130 and the antenna 200. With such specific distance condition, the package structure 10 has better electrical performance.

Referring to FIG. 7D, in some embodiments, the conductive elements 180 are disposed on the topmost layer of the metallization layers 174 of the first redistribution layer 170. In some embodiments, some of the conductive elements 180 are electrically connected to the first die 110, the second die 120 and the third die 130 through the first redistribution layer 170, the second TIVs 152, the second redistribution layer 270 and the contacting posts 153. In some embodiments, some of the conductive elements 180 are electrically connected to the antenna 200 through the first redistribution layer 170, the second TIVs 152 and the second redistribution layer 270.

In one embodiment, the fourth die 140 is joined to the first redistribution layer 170 after the conductive elements 180 are disposed. In some embodiments, the fourth die 140 is disposed on the top surface of the first redistribution layer 170 with connectors 190 there-between. In some embodiments, the fourth die 140 is connected to the first redistribution layer 170 through flip chip bonding technology. In some embodiments, the fourth die 140 may be electrically connected to the first die 110, the second die 120 and the third die 130 through the first redistribution layer 170, the second TIVs 152, the second redistribution layer 270 and the contacting posts 153 and may be electrically connected to the antenna 200 through the first redistribution layer 170, the second TIVs 152 and the second redistribution layer 270. In some embodiments, some of the conductive elements 180 and the fourth die 140 are electrically connected through the first redistribution layer 170.

Referring to FIG. 7E, in some embodiments, the carrier 102 is debonded from the antenna 200 to form the package structure 10. The antenna 200 is easily separated from the carrier 102 due to the debond layer 103 of the carrier 102. In some embodiments, the dielectric layer 104 is debonded from the carrier 102, and the first metallic portion 210 of the antenna 200 may be exposed.

FIG. 8 is a schematic cross sectional view illustrating a package structure according to some exemplary embodiments. The package structure 10 of FIG. 8 may be fabricated following the previously described manufacturing process as described in FIG. 5A and FIG. 7A-7E. Referring to FIG. 8, in some embodiments, the package structure 10 includes the antenna 200, the second redistribution layer 270, the first die 110, the second die 120, the third die 130, the molding compound 160, the first redistribution layer 170, the fourth die 140 and the conductive elements 180. In some embodiments, the second redistribution layer 270 is disposed on the antenna 200, and the top surfaces of the first die 110, the second die 120 and the third die 130 are disposed on the second redistribution layer 270. In certain embodiments, the first die 110, the second die 120 and the third die 130 are arranged side-by-side, which reduces the thickness of the package structure 10. In some embodiments, the second TIVs 152 are in direct contact with the first redistribution layer 170 and the second redistribution layer 270 and are located there-between. The contacting posts 153 located on the first die 110, the second die 120 and the third die 130 are in direct contact with the contacts 111, 121, 131 and the second redistribution layer 270 through flip chip bonding technology. In one embodiment, the first die 110, the second die 120, the third die 130, the second TIVs 152 and the contacting posts 153 are encapsulated by the molding compound 160, where the top surfaces of the second TIVs 152 are in contact with the first redistribution layer 170. In some embodiments, the first redistribution layer 170 is electrically connected to the first die 110, the second die 120 and the third die 130.

In some embodiments, the molding compound 160 is located between the antenna 200 and the first redistribution layer 170 and between the second redistribution layer 270 and the first redistribution layer 170. In some embodiments, the fourth die 140 and the conductive elements 180 are disposed on the first redistribution layer 170, and the first redistribution layer 170 is located between the fourth die 140 and the molding compound 160 and between the conductive elements 180 and the molding compound 160. In some embodiments, the conductive elements 180 are electrically connected to the first redistribution layer 170 and electrically connected to the first die 110, the second die 120, the third die 130 and/or the antenna 200 through the first redistribution layer 170, the second TIVs 152, the second redistribution layer 270 and the contacting posts 153. In one embodiment, the fourth die 140 is electrically connected to the first redistribution layer 170 through the connectors 190.

In certain embodiments, as shown in FIG. 8, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip, and the third die 130 is a 60 GHz baseband chip. Accordingly, due to the dies of different types in the package structure 10 are stacked at different levels, the package structure 10 has small form factor and further has a much wider frequency range. In one alternative embodiment, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 60 GHz baseband chip, and the third die 130 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip. However, the disclosure is not limited thereto.

In one embodiment, the antenna 200 is right above the molding compound 160. In some embodiments, a distance of the electrical connection path between the first die 110 and the antenna 200 is smaller than or equal to a distance of the electrical connection path between the second die 120 and the antenna 200 and is smaller than or equal to a distance of the electrical connection path between the third die 130 and the antenna 200. With such specific distance condition, the package structure 10 has better electrical performance.

FIG. 9A to FIG. 9J are schematic cross sectional views of various stages in a manufacturing method of a package structure according to some exemplary embodiments of the present disclosure. The elements similar to or substantially the same as the elements described previously will use the same reference numbers, and certain details or descriptions of the same elements may not be repeated herein. Referring in FIG. 9A, in some embodiments, the connectors 195 are disposed on the second metallic portion 220 of the antenna 200, following the processes as described in FIG. 3A. In some embodiments, the connectors 195 is in direct contact with the second metallic portion 220 of the antenna 200 and is electrically connected thereto. In certain embodiments, the carrier 102 is debonded from the antenna 200 to form a sub-package 20 of the antenna 200. The antenna 200 is easily separated from the carrier 102 due to the debond layer 103 of the carrier 102. In some embodiments, the dielectric layer 104 is debonded from the carrier 102, and the first metallic portion 210 of the antenna 200 is exposed.

Referring in FIG. 9B, in some embodiments, a carrier 202 is provided, the carrier 202 may be a glass carrier or any suitable carrier for the manufacturing method of the package structure. In some embodiments, the carrier 202 is provided with a debond layer 203 coated thereon, and the material of the debond layer 203 may be any material suitable for debonding the carrier 202 from the above layers disposed thereon; however, the disclosure is not limited thereto. The debond layer 203 may be an optional layer that can be omitted in other embodiments.

In some embodiments, the second redistribution layer 270 is formed on the debond layer 203 disposed on the carrier 202. The materials and formation methods of the second redistribution layer 270 are similar to those described in FIG. 5A and may not be repeated herein. In certain embodiments, the top surface of the topmost layer of the metallization layers 274 is exposed and the lowest layer of the metallization layers 274 is directly connected to the debond layer 203.

Referring in FIG. 9C, in some embodiments, one or more second through interlayer via (TIV) 152 is formed on the exposed the top surface of the topmost metallization layer 274, and the second TIV 152 is directly connected to the top surface of the topmost layer of the metallization layers 274.

Referring in FIG. 9D, in some embodiments, one or more third dies 130 are provided. In some embodiments, the first die 110, the second die 120 and the third die 130 are disposed on the carrier 202. In some embodiments, before disposing the dies on the carrier 202, the first die 110 and the second die 120 are prepared by the process as described in FIG. 1A. In certain embodiments, the first die 110, the second die 120 and the third die 130 are disposed aside the second TIV 152. In some embodiments, the die attach films 161, 162 are provided between the first die 110, the second die 120 and the antenna 200 and between the third die 130 and the first and second dies 110, 120. In certain embodiments, as shown in FIG. 9D, the first die 110, the second die 120 and the third die 130 are front-to-back attached. In some embodiments, before the third die 130 is attached to the first die 110 and the second die 120, the first TIVs 151 are formed on and connected to the contacts 111, 121 of the first and second dies 110, 120.

In certain embodiments, as shown in FIG. 9D, the first die 110 is a 60 GHz radio frequency chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip, and the third die 130 is a 60 GHz baseband chip. Due to the antenna and the dies of different types in the package structure 10 are stacked at different levels, the package structure 10 has small form factor and further has a much wider frequency range. In alternative embodiment, the first die 110 is a 60 GHz baseband chip, the second die 120 is a 2.4 GHz radio frequency chip or a 5 GHz radio frequency chip, or a combined 2.4 GHz/5 GHz radio frequency chip, and the third die 130 is a 60 GHz radio frequency chip. However, the disclosure is not limited thereto.

Referring to FIG. 9E, in some embodiments, the first die 110, the second die 120, the third die 130, the first TIVs 151, the second TIVs 152 and the contacting posts 153 are encapsulated in a molding compound 160. In one embodiment, the molding compound 160 at least fills the space between the first die 110, the second die 120, the third die 130, the first TIVs 151 and the second TIVs 152, and covers the second redistribution layer 270. In some embodiments, the molding compound 160 is planarized to expose top surfaces of the first TIVs 151, the second TIVs 152, the contacting posts 153, and the protection layer 163. In certain embodiments, as shown in FIG. 5B, after the planarization, the first TIVs 151, top surfaces of the second TIVs 152 and the molding compound 160 and the third die 130 become substantially leveled. In one embodiment, the top surfaces of the first TIVs 151, the second TIVs 152, the contacting posts 153, the molding compound 160 and the protection layer 163 are coplanar.

Referring to FIG. 9F, in some embodiments, the first redistribution layer 170 is formed on the molding compound 160, the first TIVs 151, the second TIV 152, the first die 110, the second 120 and the third die 130. In some embodiments, the first redistribution layer 170 is electrically connected to the first die 110 through the contacting posts 153 and electrically connected to the second die 120 and the third die 130 through the first TIVs 151. In some embodiments, the first redistribution layer 170 is electrically connected to the second redistribution layer 270 through the second TIV 152. The materials and the formation methods of the first redistribution layer 170 are similar to those described in FIG. 1E and may not be repeated herein. In certain embodiments, as shown in FIG. 9F, the top surface of the topmost layer of the metallization layers 174 is exposed and the lowest layer of the metallization layers 174 is connected to the first TIVs 151, the second TIV 152 and the contacting posts 153.

Referring to FIG. 9G, in some embodiments, the conductive elements 180 are disposed on the topmost layer of the metallization layers 174 of the first redistribution layer 170. In some embodiments, some of the conductive elements 180 are electrically connected to the first die 110 through the first redistribution layer 170 and the contacting posts 153, and some of the conductive elements 180 are electrically connected to the second die 120 and the third die 130 through the first redistribution layer 170 and the first TIVs 151.

In some embodiments, the fourth die 140 is disposed on the top surface of the first redistribution layer 170 with connectors 190 there-between. In one embodiment, the fourth die 140 is joined to the first redistribution layer 170 after the conductive elements 180 are disposed. In some embodiments, the fourth die 140 is connected to the first redistribution layer 170 through flip chip bonding technology. In some embodiments, the fourth die 140 may be electrically connected to the first die 110 through the connectors 190, the first redistribution layer 170 and the contacting posts 153, and may be electrically connected to the second die 120 and the third die 130 through the connectors 190, the first redistribution layer 170 and the first TIVs 151. In some embodiments, some of the conductive elements 180 and the fourth die 140 are electrically connected to each other through the first redistribution layer 170.

Referring to FIG. 9H, in some embodiments, the carrier 202 is debonded from the second redistribution layer 270. The second redistribution layer 270 is easily separated from the carrier 202 due to the debond layer 203 of the carrier 202. In some embodiments, the second redistribution layer 270 is debonded from the carrier 102, and the lowest metallization layer 274 of the second redistribution layer 270 is exposed.

Referring to FIG. 9I, in some embodiments, the sub-package 20 of the antenna 200 is disposed on the second redistribution layer 270 to form the package structure 10 through the connectors 195. In certain embodiments, the connectors 195 of the antenna 200 are disposed on the exposed lowest layer of the metallization layers 274 of the second redistribution layer 270. In some embodiments, the sub-package 20 of the antenna 200 is disposed on the second redistribution layer 270 through flip chip bonding technology and/or surface mount technology. In some embodiments, a distance of the electrical connection path between the first die 110 and the antenna 200 is smaller than or equal to a distance of the electrical connection path between the second die 120 and the antenna 200 and is smaller than or equal to a distance of the electrical connection path between the third die 130 and the antenna 200. With such specific distance condition, the package structure 10 has better electrical performance.

According to some embodiments, a package structure has a first die, a second die, a third die, a molding compound, a first redistribution layer, an antenna, and conductive elements. The first die, the second die and the third die are molded in a molding compound. The first redistribution layer is disposed on the molding compound and is electrically connected to the first die, the second die and the third die. The antenna is located on the molding compound and electrically connected to the first die, the second die and the third die, wherein a distance of an electrical connection path between the first die and the antenna is smaller than or equal to a distance of an electrical connection path between the second die and the antenna and a distance of an electrical connection path between the third die and the antenna. The conductive elements are connected to the first redistribution layer, wherein the first redistribution layer is located between the conductive elements and the molding compound.

According to some embodiments, a manufacturing method of a package structure is provided. A first die, a second die and a third die are disposed on a carrier. The first die, the second die and the third die are encapsulated in a molding compound. The first redistribution layer is formed on the molding compound, wherein the first redistribution layer is electrically connected to the first die, the second die the third die. An antenna is formed on the carrier, wherein the antenna is electrically connected to the first die, the second die and the third die, and a distance of an electrical connection path between the first die and the antenna is smaller than or equal to a distance of an electrical connection path between the second die and the antenna and a distance of an electrical connection path between the third die and the antenna. The conductive elements are disposed on the first redistribution layer, wherein the first redistribution layer is located between the molding compound and the conductive elements. The carrier is debonded from the antenna.

According to some embodiments, a manufacturing method of a package structure is provided. A sub-package is formed by disposing a first die, a second die and a third die on a first carrier; encapsulating the first die, the second die and the third die in a molding compound; forming a first redistribution layer on the molding compound, wherein the first redistribution layer is electrically connected to the first die, the second die, the third die, and the molding compound is located between the first redistribution layer and the first carrier; forming a second redistribution layer on the first carrier, wherein the second redistribution layer is between the molding compound and the first carrier; forming at least one second through interlayer via on the second redistribution layer and encapsulated in the molding compound, wherein the at least one second through interlayer via is electrically connected to the first redistribution layer and the second redistribution layer; disposing conductive elements on the first redistribution layer, wherein the first redistribution layer is located between the molding compound and the conductive elements; and debonding the first carrier. An antenna package is formed by forming a first metal layer on a second carrier; forming a dielectric layer on the first metal layer; forming a second metal layer on the dielectric layer, wherein the dielectric layer is sandwiched between the first metal layer and the second metal layer; and debonding the second carrier. The antenna package is disposed onto the second redistribution layer of the sub-package through flip chip bonding technology and/or surface mount technology, wherein the antenna package is electrically connected to the first die, the second die and the third die, and a distance of an electrical connection path between the first die and the antenna package is smaller than or equal to a distance of an electrical connection path between the second die and the antenna package and a distance of an electrical connection path between the third die and the antenna package.

The foregoing outlines features of several embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions, and alterations herein without departing from the spirit and scope of the present disclosure. 

1. A package structure, comprising a first die, a second die and a third die, molded in a molding compound; a first redistribution layer, disposed on the molding compound and electrically connected to the first die, the second die and the third die; an antenna, located on the molding compound and electrically connected to the first die, the second die and the third die, wherein a distance of an electrical connection path between the first die and the antenna is smaller than or equal to a distance of an electrical connection path between the second die and the antenna and a distance of an electrical connection path between the third die and the antenna; and conductive elements, connected to the first redistribution layer, wherein the first redistribution layer is located between the conductive elements and the molding compound.
 2. The package structure as claimed in claim 1, further comprising a fourth die disposed on the molding compound and electrically connected to the first redistribution layer, wherein the first redistribution layer is located between the fourth die and the molding compound.
 3. The package structure as claimed in claim 1, wherein the first die and the second die are arranged side-by-side, and the third die is stacked over the first die and the second die.
 4. The package structure as claimed in claim 3, further comprises: first through interlayer vias, disposed on the first die and the second die and encapsulated in the molding compound; and contacting posts, disposed on the third die and encapsulated in the molding compound, wherein the first redistribution layer is electrically connected the first die and the second die through the first through interlayer vias and is electrically connected the third die through the contacting posts.
 5. The package structure as claimed in claim 4, wherein the antenna comprises a first metallic portion and a second metallic portion, the first metallic portion is located at a side of the molding compound opposite to the first redistribution layer, the second metallic portion is located in the first redistribution layer, and the molding compound is located between the first metallic portion and the second metallic portion of the antenna, and the antenna is arranged aside the first, second and third dies.
 6. The package structure as claimed in claim 1, wherein the antenna comprises an antenna array, and the package structure further comprising at least one second through interlayer via encapsulated in the molding compound, wherein the at least one second through interlayer via is electrically connected to the first redistribution layer and the antenna.
 7. The package structure as claimed in claim 1, further comprising a second redistribution layer located between the molding compound and the antenna, wherein the second redistribution layer is electrically connected to the first redistribution layer through the at least one second through interlayer via, and the second redistribution layer is electrically connected to the first die, the second die and the third die.
 8. The package structure as claimed in claim 1, wherein the first die, the second die and the third die are arranged side-by-side.
 9. The package structure as claimed in claim 8, further comprises contacting posts disposed on the first die, the second die and third die, wherein the contacting posts are encapsulated in the molding compound, and the first die, the second die and the third die are electrically connected to the first redistribution layer through the contacting posts.
 10. A manufacturing method of a package structure, comprising: disposing a first die, a second die and a third die on a carrier, encapsulating the first die, the second die and the third die in a molding compound; forming a first redistribution layer on the molding compound, wherein the first redistribution layer is electrically connected to the first die, the second die and the third die; forming an antenna on the carrier, wherein the antenna is electrically connected to the first die, the second die and the third die, and a distance of an electrical connection path between the first die and the antenna is smaller than or equal to a distance of an electrical connection path between the second die and the antenna and a distance of an electrical connection path between the third die and the antenna; disposing conductive elements on the first redistribution layer, wherein the first redistribution layer is located between the molding compound and the conductive elements; and debonding the carrier from the antenna.
 11. The manufacturing method as claimed in claim 10, after the step of forming the first redistribution layer and before the step of debonding the carrier, further comprising: disposing a fourth die on the first redistribution layer, wherein the fourth die is electrically connected to the first redistribution layer and is between the fourth die and the molding compound.
 12. The manufacturing method as claimed in claim 10, wherein the step of disposing the first die, the second die and the third die comprises: disposing the first die and the second die on the carrier, and disposing the third die on the first die and the second die.
 13. The manufacturing method as claimed in claim 12, wherein the step of forming the antenna on the carrier comprises: forming a first metallic portion of the antenna on the carrier before disposing the first die, the second die and the third die on the carrier, and forming a second metallic portion of the antenna in the first redistribution layer in the step of forming the first redistribution layer, wherein the second metallic portion is electrically connected to the first redistribution layer, and the first metallic portion and the antenna is arranged aside the first, second and third dies.
 14. The manufacturing method as claimed in claim 10, wherein after the step of the forming the antenna and prior to the step of disposing the first die, the second die and the third die on the carrier, the method further comprise forming at least one second through interlayer via on the antenna, the at least one second through interlayer via is electrically connected to the antenna and the first redistribution layer and is encapsulated in the molding compound, the antenna comprises an antenna array and the first die, the second die and the third die rest on the antenna array.
 15. The manufacturing method as claimed in claim 14, wherein after the step of forming the antenna on the carrier and before the step of forming the at least one second through interlayer via, the method further comprises forming a second redistribution layer on the antenna array, wherein the second redistribution layer is electrically connected to the antenna and the at least one second through interlayer via, and the second redistribution layer is electrically connected to the first die, the second die and the third die.
 16. The manufacturing method as claimed in claim 10, wherein before the step of disposing the first die, the second die and the third die, the manufacturing method further comprises: forming first through interlayer vias on the first die and the second die, and forming a protection layer and contacting posts disposed in the protection layer on the third die, wherein the first redistribution layer is electrically connected the first die and the second die through the first through interlayer vias and is electrically connected to the third die through the contacting posts.
 17. The manufacturing method as claimed in claim 10, wherein the step of disposing the first die, the second die and the third die comprises disposing the first die, the second die and the third die on the carrier in an arraignment of side-by-side.
 18. The manufacturing method as claimed in claim 10, wherein before the step of disposing the first die, the second die and the third die, the manufacturing method further comprises: forming a protection layer and contacting posts disposed in the protection layer on the first die, the second die and the third die, wherein the first redistribution layer is electrically connected the first die, the second die and the third die through the contacting posts.
 19. A manufacturing method of a package structure, comprising: forming a sub-package, comprising: disposing a first die, a second die and a third die on a first carrier; encapsulating the first die, the second die and the third die in a molding compound; forming a first redistribution layer on the molding compound, wherein the first redistribution layer is electrically connected to the first die, the second die and the third die, and the molding compound is located between the first redistribution layer and the first carrier, forming a second redistribution layer on the first carrier, wherein the second redistribution layer is between the molding compound and the first carrier, forming at least one second through interlayer via on the second redistribution layer and encapsulated in the molding compound, wherein the at least one second through interlayer via is electrically connected to the first redistribution layer and the second redistribution layer, disposing conductive elements on the first redistribution layer, wherein the first redistribution layer is located between the molding compound and the conductive elements; and debonding the first carrier, providing an antenna package; and disposed the antenna package onto the second redistribution layer of the sub-package, wherein the antenna package is electrically connected the second redistribution layer through flip chip bonding technology and/or surface mount technology, and is electrically connected to the first die, the second die and the third die, and a distance of an electrical connection path between the first die and the antenna package is smaller than or equal to a distance of an electrical connection path between the second die and the antenna package and a distance of an electrical connection path between the third die and the antenna package.
 20. The manufacturing method as claimed in claim 19, after the step of forming the first redistribution layer and before the step of debonding the first carrier, further disposing a fourth die on the first redistribution layer, wherein the fourth die is electrically connected to the first redistribution layer. 